CDR125NP-331MC Equivalent & Substitute Parts

Part Overview

The CDR125NP-331MC is a 330 µH shielded surface mount inductor manufactured by Sumida America Components Inc. This component is rated for 570 mA continuous current with a maximum DC resistance of 800mOhm and operates across the temperature range of -40°C to 100°C. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement continuity.

Substiute Parts

CDR125NP-331MC

Sumida America Components Inc.In Stock: 1091CDR125NP-331MC Datasheet

Current PartRFQ

CDRH124NP-331MC

Sumida America Components Inc.In Stock: 1146CDRH124NP-331MC Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDR125NP-331MC is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 330 µH (exact match required)
• Shielding type: Shielded (electromagnetic containment requirement)
• Mounting type: Surface Mount (PCB assembly compatibility)
• Operating temperature range: -40°C ~ 100°C (thermal envelope)
• RoHS3 compliance: Required for regulatory alignment

Secondary Compatibility Parameters:

• Current rating: Substitute must support minimum 570 mA or higher
• DC resistance: Substitute DCR must not exceed application thermal and efficiency limits
• Moisture sensitivity: MSL 1 rating acceptable

The CDRH124NP-331MC qualifies as a direct substitute based on matching inductance, shielding, surface mount configuration, temperature range, and RoHS3 compliance. The substitute exhibits a lower current rating (500 mA) and higher DCR (990mOhm Max), requiring application-level verification of thermal and power dissipation margins.

Parameter Comparison

Engineering Selection Recommendations

The CDRH124NP-331MC is the qualified substitute for the obsolete CDR125NP-331MC based on the following engineering criteria:

Compliance & Availability: The substitute maintains ROHS3 compliance and active product status, ensuring long-term procurement viability and regulatory alignment with current manufacturing standards.

Electrical Compatibility: Both components share identical 330 µH inductance values and shielded configuration, preserving electromagnetic performance in the circuit. The substitute's inductance tolerance of ±20% is within acceptable engineering margins for this component category.

Thermal & Current Considerations: The substitute operates within the same -40°C to 100°C temperature range. However, the current rating differential (500 mA substitute versus 570 mA original) and increased DCR (990mOhm versus 800mOhm) require circuit-level analysis to confirm thermal dissipation and voltage drop margins remain within design specifications.

Physical Integration: The substitute exhibits reduced physical dimensions (height 4.50mm versus 5.90mm) and comparable footprint area, providing improved PCB layout flexibility with no adverse mechanical constraints.

Frequently Asked Questions (FAQ)

Q: Can the CDRH124NP-331MC directly replace the CDR125NP-331MC without circuit modification?

A: Electrical substitution is valid based on matching inductance, shielding, and temperature range. However, the reduced current rating (500 mA versus 570 mA) and increased DCR (990mOhm versus 800mOhm) require verification that circuit operating current and thermal dissipation remain within acceptable limits for the specific application.

Q: What is the significance of the inductance tolerance difference (-15%, +20% versus ±20%)?

A: The substitute's symmetric ±20% tolerance is slightly wider than the original's asymmetric tolerance. For applications requiring tight inductance control, this tolerance band must be evaluated against circuit performance specifications.

Q: Are there physical compatibility concerns with the smaller substitute package?

A: The CDRH124NP-331MC is physically smaller (12.00mm x 12.00mm footprint, 4.50mm height) compared to the original (12.60mm x 11.60mm footprint, 5.90mm height). PCB layout must accommodate the reduced height; footprint area is comparable and presents no assembly constraints.

Q: Why is the substitute's DC resistance higher?

A: The CDRH124NP-331MC exhibits 990mOhm maximum DCR compared to 800mOhm for the original. This 190mOhm increase results in proportionally higher resistive losses. At 500 mA operation, this generates approximately 0.245 W additional dissipation compared to the original at 570 mA, requiring thermal margin verification.

Q: What is the difference between the inductance test frequencies?

A: The original is tested at 1 kHz while the substitute is tested at 100 kHz. Both measurements characterize the same 330 µH inductance value; the different test frequencies reflect manufacturer measurement standards and do not affect component substitution validity.

Q: Is the substitute available in the same packaging format?

A: The substitute is supplied in Tape & Reel (TR) packaging, while the original packaging format is not specified in the provided data. Confirm packaging compatibility with assembly equipment and procurement requirements.